Protoconchs (left) and close-up views of apical microstructure (right). A, B Hemistomia andreae sp. n. C, D Leiorhagium adioincola sp. n. E, F Leiorhagium aremuum sp. n. G, H Leiorhagium clandestinum I, J Leiorhagium neteae sp. n. Scale bars 50 µm (A, C, E, G, I), 10 µm (B, D, F, H, J).